Camera optical lens

ABSTRACT

The present disclosure relates to an optical lens and discloses a camera optical lens. The camera optical lens includes, from an object side to an image side: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens. The camera optical lens satisfies following conditions: 1.51≤f1/f≤2.50; 1.70≤n7≤2.20; −2.00≤f3/f4≤2.00; −10.00≤(R13+R14)/(R13−R14)≤2.00; and 0.01≤d13/TTL≤0.08; where f, f1, f3 f4 denote a focal length of the camera optical lens, a focal length of the first lens, a focal length of the third lens, a focal length of the fourth lens respectively; n7 denotes a refractive index of the seventh lens; d13 denotes an on-axis thickness of the seventh lens; TTL donates a total optical length; R13 and R14 denote a curvature radius of an object-side surface and a curvature radius of an image-side surface of the seventh lens respectively.

TECHNICAL FIELD

The present disclosure relates to the field of optical lens, particular, to a camera optical lens suitable for handheld devices, such as smart phones and digital cameras, and imaging devices, such as monitors or PC lenses.

BACKGROUND

With the emergence of smart phones in recent years, the demand for miniature camera lens is increasing day by day, but in general the photosensitive devices of camera lens are nothing more than Charge Coupled Device (CCD) or Complementary Metal-Oxide Semiconductor Sensor (CMOS sensor), and as the progress of the semiconductor manufacturing technology makes the pixel size of the photosensitive devices become smaller, plus the current development trend of electronic products towards better functions and thinner and smaller dimensions, miniature camera lens with good imaging quality therefore have become a mainstream in the market. In order to obtain better imaging quality, the lens that is traditionally equipped in mobile phone cameras adopts a three-piece or four-piece lens structure. Also, with the development of technology and the increase of the diverse demands of users, and as the pixel area of photosensitive devices is becoming smaller and smaller and the requirement of the system on the imaging quality is improving constantly, the five-piece, six-piece and seven-piece lens structure gradually appear in lens designs. There is an urgent need for ultra-thin wide-angle camera lenses which with good optical characteristics and fully corrected aberration.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a schematic diagram of a structure of a camera optical lens according to Embodiment 1 of the present disclosure.

FIG. 2 is a schematic diagram of a longitudinal aberration of the camera optical lens shown in FIG. 1.

FIG. 3 is a schematic diagram of a lateral color of the camera optical lens shown in FIG. 1.

FIG. 4 is a schematic diagram of a field curvature and a distortion of the camera optical lens shown in FIG. 1.

FIG. 5 is a schematic diagram of a structure of a camera optical lens according to Embodiment 2 of the present disclosure.

FIG. 6 is a schematic diagram of a longitudinal aberration of the camera optical lens shown in FIG. 5.

FIG. 7 is a schematic diagram of a lateral color of the camera optical lens shown in FIG. 5.

FIG. 8 is a schematic diagram of a field curvature and a distortion of the camera optical lens shown in FIG. 5.

FIG. 9 is a schematic diagram of a structure of a camera optical lens according to Embodiment 3 of the present disclosure.

FIG. 10 is a schematic diagram of a longitudinal aberration of the camera optical lens shown in FIG. 9.

FIG. 11 is a schematic diagram of a lateral color of the camera optical lens shown in FIG. 9.

FIG. 12 is a schematic diagram of a field curvature and a distortion of the camera optical lens shown in FIG. 9.

DETAILED DESCRIPTION OF EMBODIMENTS

To make the objects, technical solutions, and advantages of the present disclosure clearer, embodiments of the present disclosure are described in detail with reference to accompanying drawings in the following. A person of ordinary skill in the art can understand that, in the embodiments of the present disclosure, many technical details are provided to make readers better understand the present disclosure. However, even without these technical details and any changes and modifications based on the following embodiments, technical solutions required to be protected by the present disclosure can be implemented.

Embodiment 1

Referring to the accompanying drawings, the present disclosure provides a camera optical lens 10. FIG. 1 shows the camera optical lens 10 of Embodiment 1 of the present disclosure, the camera optical lens 10 includes seven lenses. Specifically, the camera optical lens 10 includes, from an object side to an image side: an aperture S1, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and a seventh lens L7. An optical element such as an optical filter GF can be arranged between the seventh lens L7 and an image surface Si.

The first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 are all made of plastic material, the seventh lens L7 is made of glass material.

Here, a focal length of the camera optical lens 10 is defined as f, and a focal length of the first lens L1 is defined as f1. The camera optical lens 10 satisfies a condition of 1.51≤f1/f≤2.50, which specifies that the first lens L1 has a positive refractive power. If beyond the lower specified value, though it is beneficial for an ultra-thin lens, the first lens L1 has a relative strong positive refractive power and is difficult for correcting aberration, and is not beneficial for wide-angle development of a lens. On the contrary, if beyond the upper specified value, the first lens L1 has a relative weak positive refractive power, which is difficult for ultra-thin development of a lens.

A refractive index of the seventh lens L7 is defined as n7, and 1.70≤n7≤2.20, which specifies the refractive index of the seventh lens L7. Within this range, it is beneficial for the development into the direction of ultra-thin lenses, as well as correcting aberration of the optical system. Preferably, the camera optical lens 10 further satisfies a condition of 1.71≤n7≤2.16.

A focal length of the third lens L3 is defined as f3, a focal length of the fourth length is defined as f4, and −2.00≤f3/f4≤2.00, which specifies a ratio between the focal length f3 of the third lens L3 and the focal length f4 of the fourth length L4. This can effectively reduce sensitiveness of the camera optical lenses, and further improve imaging quality.

A curvature radius of an object side surface of the first lens L7 is defined as R13, a curvature radius of an image side surface of the first lens L7 is defined as R14, and the camera optical lens 10 further satisfies a condition of −10.00≤(R13+R14)/(R13−R14)≤2.00, which specifies a shape of the seventh lens L7. Within this range, it is beneficial for the development into the direction of ultra-thin lenses, as well as correcting aberration of the optical system. Preferably, the camera optical lens 10 further satisfies a condition of −9.98≤(R13+R14)/(R13−R14)≤2.00.

An on-axis thickness of the seventh lens L7 is defined as d13, a total optical length from the object-side surface of the first lens L1 to the image surface Si of the camera optical lens along an optical axis is defined as TTL, and the camera optical lens 10 further satisfies a condition of 0.01≤d13/TTL≤0.08, which specifies a ratio between the on-axis thickness of the seventh lens L7 and the total optical length TTL of the camera optical lens 10. This can facilitate achieving ultra-thin lenses. Preferably, the camera optical lens 10 further satisfies a condition of 0.02≤d13/TTL≤0.08.

When the focal length f of the camera optical lens, the focal length f1 of the first lens L1, the focal length f3 of the third lens L3, the focal length f4 of the fourth lens L4, the on-axis thickness d13 of the seventh lens L7, the refractive index n7 of the seventh lens L7, the curvature radius R13 of the object-side surface of the seventh lens L7, the curvature radius R14 of the image-side surface of the seventh lens L7 and the total optical length TTL of the camera optical lens 10 all satisfy the above conditions, the camera optical lens 10 has an advantage of high performance and satisfies a design requirement of low TTL.

In an embodiment, the object-side surface of the first lens L1 is convex in a paraxial region, the image-side surface of the first lens L1 is concave in the paraxial region, and the first lens L1 has a positive refractive power.

A curvature radius R1 of an object side surface of the first lens L1 and a curvature radius R2 of an image side surface of the first lens L1 satisfy a condition of −6.00≤(R1+R2)/(R1−R2)≤−1.52, which reasonably controls a shape of the first lens, so that the first lens may effectively correct system spherical aberration. Preferably, the camera optical lens 10 further satisfies a condition of −3.75≤(R1+R2)/(R1−R2)≤−1.90.

An on-axis thickness of the first lens L1 is defined as d1, and the camera optical lens 10 further satisfies a condition of 0.04≤d1/TTL≤0.14. This can facilitate achieving ultra-thin lenses. Preferably, the camera optical lens 10 further satisfies a condition of 0.06≤d1/TTL≤0.11.

In an embodiment, an object-side surface of the second lens L2 is convex in the paraxial region and an image-side surface of the second lens L2 is convex in the paraxial region, and the second lens L2 has a positive refractive power.

The focal length of the second lens L2 is defined as f2, and the camera optical lens 10 further satisfies a condition of 0.78≤f2/f≤5.07. By controlling a positive refractive power of the second lens L2 within a reasonable range, correction of the aberration of the optical system can be facilitated. Preferably, the camera optical lens 10 further satisfies a condition of 1.26≤f2/f≤4.06.

A curvature radius of the object-side surface of the second lens L2 is defined as R3, a curvature radius of the image-side surface of the second lens L2 is defined as R4, and the camera optical lens 10 further satisfies a condition of −1.00≤(R3+R4)/(R3−R4)≤0.04, which specifies a shape of the second lens L2. Within this range, a development towards ultra-thin and wide-angle lenses would facilitate correcting the problem of an on-axis aberration. Preferably, the camera optical lens 10 further satisfies a condition of −0.62≤(R3+R4)/(R3−R4)≤0.03.

An on-axis thickness of the second lens L2 is defined as d3, and the camera optical lens 10 further satisfies a condition of 0.04≤d3/TTL≤0.19, which is beneficial for ultra-thinning of the optical system. Preferably, the camera optical lens 10 further satisfies a condition of 0.07≤d3/TTL≤0.15.

In an embodiment, an object-side surface of the third lens L3 is convex in the paraxial region and an image-side surface of the third lens L3 is concave in the paraxial region, and the third lens L3 has a negative refractive power.

A focal length of the third lens L3 is defined as f3, and the camera optical lens 10 further satisfies a condition of −15.69≤f3/f≤−0.91. An appropriate distribution of the refractive power leads to a better imaging quality and a lower sensitivity. Preferably, the camera optical lens 10 further satisfies a condition of −9.80≤f3/f≤−1.14.

A curvature radius of the object-side surface of the third lens L3 is defined as R5, a curvature radius of the image-side surface of the third lens L3 is defined as R6, and the camera optical lens 10 further satisfies a condition of 1.10≤(R5+R6)/(R5−R6)≤18.10. This can effectively control a shape of the third lens L3, thereby facilitating shaping of the third lens and avoiding bad shaping and generation of stress due to an the overly large surface curvature of the third lens L3. Preferably, the camera optical lens 10 further satisfies a condition of 1.76≤(R5+R6)/(R5−R6)≤14.48.

An on-axis thickness of the third lens L3 is defined as d5, and the camera optical lens 10 further satisfies a condition of 0.02≤d5/TTL≤0.06. This can facilitate achieving ultra-thin lenses. Preferably, the camera optical lens 10 further satisfies a condition of 0.03≤d5/TTL≤0.05.

In an embodiment, the fourth lens L4 has a refractive power.

A focal length of the fourth lens L4 is defined as f4, and the camera optical lens 10 further satisfies a condition of −7.85≤f4/f≤2.76. The appropriate distribution of refractive power makes it possible that the system has the better imaging quality and the lower sensitivity. Preferably, the camera optical lens 10 further satisfies a condition further satisfies a condition of further satisfies a condition of further satisfies a further satisfies a condition of −4.91≤f4/f≤2.21.

A curvature radius of the object-side surface of the fourth lens L4 is defined as R7, a curvature radius of the image-side surface of the fourth lens L4 is defined as R8, and the camera optical lens 10 further satisfies a condition of −0.81≤(R7+R8)/(R7−R8)≤1.08, which specifies a shape of the fourth lens L4. Within this range, a development towards ultra-thin and wide-angle lens would facilitate correcting a problem like an off-axis aberration. Preferably, the camera optical lens 10 further satisfies a condition of −0.51≤(R7+R8)/(R7−R8)≤0.87.

An on-axis thickness of the fourth lens L4 is defined as d7, and the camera optical lens 10 further satisfies a condition of 0.03≤d7/TTL≤0.13. This can facilitate achieving ultra-thin lenses. Preferably, the camera optical lens 10 further satisfies a condition of 0.05≤d7/TTL≤0.10.

In an embodiment, the fifth lens L5 comprises an object-side surface being concave in a paraxial region and an image-side surface being convex in the paraxial region, and has a negative refractive power.

A focal length of the fifth lens L5 is defined as f5, and the camera optical lens 10 further satisfies a condition of −427.13≤f5/f≤−1.23, which can effectively make a light angle of the camera lens gentle and reduce an tolerance sensitivity. Preferably, the camera optical lens 10 further satisfies a condition of −266.96≤f5/f≤−1.54.

A curvature radius of the object-side surface of the fifth lens L5 is defined as R9, a curvature radius of the image-side surface of the fifth lens L5 is defined as R10, and the camera optical lens 10 further satisfies a condition of −42.34≤(R9+R10)/(R9−R10)≤−2.27, which specifies a shape of the fifth lens L5. Within this range, a development towards ultra-thin and wide-angle lenses can facilitate correcting a problem of the off-axis aberration. Preferably, the camera optical lens 10 further satisfies a condition of −26.46≤(R9+R10)/(R9−R10)≤−2.84.

An on-axis thickness of the fifth lens L5 is defined as d9, and the camera optical lens 10 further satisfies a condition of 0.03≤d9/TTL≤0.11. This can facilitate achieving ultra-thin lenses. Preferably, the camera optical lens 10 further satisfies a condition of 0.05≤d9/TTL≤0.09.

In an embodiment, an object-side surface of the sixth lens L6 is convex in the paraxial region, an image-side surface of the sixth lens L6 is concave in the paraxial region, and the sixth lens L6 has a positive refractive power.

A focal length of the sixth lens L6 is defined as f6, and the camera optical lens 10 further satisfies a condition of 0.37≤f6/f≤4.17. The appropriate distribution of refractive power makes it possible that the system has the better imaging quality and lower sensitivity. Preferably, the camera optical lens 10 further satisfies a condition of 0.59≤f6/f≤3.33.

A curvature radius of the object-side surface of the sixth lens L6 is defined as R11, a curvature radius of the image-side surface of the sixth lens L6 is defined as R12, and the camera optical lens 10 further satisfies a condition of −23.83≤(R11+R12)/(R11−R12)≤−1.50, which specifies a shape of the sixth lens L6. Within this range, a development towards ultra-thin and wide-angle lenses would facilitate correcting a problem like aberration of the off-axis aberration. Preferably, the camera optical lens 10 further satisfies a condition of −14.89≤(R11+R12)/(R11−R12)≤−1.88.

An on-axis thickness of the sixth lens L6 is defined as d11, and the camera optical lens 10 further satisfies a condition of 0.05≤d11/TTL≤0.19. This can facilitate achieving ultra-thin lenses. Preferably, the camera optical lens 10 further satisfies a condition of 0.08≤d11/TTL≤0.16.

In an embodiment, the seventh lens L7 has a negative refractive power.

A focal length of seventh lens L7 is defined as f7, and the camera optical lens 10 further satisfies a condition of −12.21≤f7/f≤−0.71. The appropriate distribution of refractive power makes it possible that the system has the better imaging quality and lower sensitivity. Preferably, the camera optical lens 10 further satisfies a condition of −7.63≤f7/f≤−0.89.

In an embodiment, the total optical length TTL of the camera optical lens 10 is less than or equal to 6.00 mm, which is beneficial for achieving ultra-thin lenses. Preferably, the total optical length TTL of the camera optical lens 10 is less than or equal to 5.72 mm.

In an embodiment, an F number of the camera optical lens 10 is less than or equal to 1.65. The camera optical lens has a large aperture and a better imaging performance. Preferably, the F number of the camera optical lens 10 is less than or equal to 1.62.

With such designs, the total optical length TTL of the camera optical lens 10 can be made as short as possible, thus the miniaturization characteristics can be maintained.

In the following, examples will be used to describe the camera optical lens 10 of the present disclosure. The symbols recorded in each example will be described as follows. The focal length, on-axis distance, curvature radius, on-axis thickness, inflexion point position, and arrest point position are all in units of mm.

TTL: Optical length (the total optical length from the object side surface of the first lens to the image surface of the camera optical lens along the optical axis) in mm.

Preferably, inflexion points and/or arrest points can be arranged on the object-side surface and/or the image-side surface of the lens, so as to satisfy the demand for high quality imaging. The description below can be referred for specific implementations.

The design data of the camera optical lens 10 in Embodiment 1 of the present disclosure are shown in Table 1 and Table 2.

TABLE 1 R d nd νd S1 ∞ d0= −0.301 R1 2.157 d1= 0.427 nd1 1.5473 ν1 55.81 R2 5.539 d2= 0.101 R3 10.037 d3= 0.470 nd2 1.5473 ν2 55.81 R4 −30.081 d4= 0.037 R5 2.722 d5= 0.223 nd3 1.6464 ν3 23.54 R6 1.898 d6= 0.447 R7 7.644 d7= 0.382 nd4 1.5473 ν4 55.81 R8 −4.777 d8= 0.234 R9 −1.203 d9= 0.391 nd5 1.6464 ν5 23.54 R10 −1.619 d10= 0.076 R11 1.637 d11= 0.593 nd6 1.5473 ν6 55.81 R12 1.937 d12= 0.898 R13 −1.331 d13= 0.419 nd7 1.7114 ν7 30.23 R14 −1.628 d14= 0.249 R15 ∞ d15= 0.210 ndg 1.5168 νg 64.17 R16 ∞ d16= 0.143

In the table, meanings of various symbols will be described as follows.

S1: aperture;

R: curvature radius of an optical surface, a central curvature radius for a lens;

R1: curvature radius of the object-side surface of the first lens L1;

R2: curvature radius of the image-side surface of the first lens L1;

R3: curvature radius of the object-side surface of the second lens L2;

R4: curvature radius of the image-side surface of the second lens L2;

R5: curvature radius of the object-side surface of the third lens L3;

R6: curvature radius of the image-side surface of the third lens L3;

R7: curvature radius of the object-side surface of the fourth lens L4;

R8: curvature radius of the image-side surface of the fourth lens L4;

R9: curvature radius of the object-side surface of the fifth lens L5;

R10: curvature radius of the image-side surface of the fifth lens L5;

R11: curvature radius of the object-side surface of the sixth lens L6;

R12: curvature radius of the image-side surface of the sixth lens L6;

R13: curvature radius of the object-side surface of the seventh lens L7;

R14: curvature radius of the image-side surface of the seventh lens L7;

R15: curvature radius of an object-side surface of the optical filter GF;

R16: curvature radius of an image-side surface of the optical filter GF;

d: on-axis thickness of a lens and an on-axis distance between lens;

d0: on-axis distance from the aperture S1 to the object-side surface of the first lens L1;

d1: on-axis thickness of the first lens L1;

d2: on-axis distance from the image-side surface of the first lens L1 to the object-side surface of the second lens L2;

d3: on-axis thickness of the second lens L2;

d4: on-axis distance from the image-side surface of the second lens L2 to the object-side surface of the third lens L3;

d5: on-axis thickness of the third lens L3;

d6: on-axis distance from the image-side surface of the third lens L3 to the object-side surface of the fourth lens L4;

d7: on-axis thickness of the fourth lens L4;

d8: on-axis distance from the image-side surface of the fourth lens L4 to the object-side surface of the fifth lens L5;

d9: on-axis thickness of the fifth lens L5;

d10: on-axis distance from the image-side surface of the fifth lens L5 to the object-side surface of the sixth lens L6;

d11: on-axis thickness of the sixth lens L6;

d12: on-axis distance from the image-side surface of the sixth lens L6 to the object-side surface of the seventh lens L7;

d13: on-axis thickness of the seventh lens L7;

d14: on-axis distance from the image-side surface of the seventh lens L7 to the object-side surface of the optical filter GF;

d15: on-axis thickness of the optical filter GF;

d16: on-axis distance from the image-side surface to the image surface of the optical filter GF;

nd: refractive index of the d line;

nd1: refractive index of the d line of the first lens L1;

nd2: refractive index of the d line of the second lens L2;

nd3: refractive index of the d line of the third lens L3;

nd4: refractive index of the d line of the fourth lens L4;

nd5: refractive index of the d line of the fifth lens L5;

nd6: refractive index of the d line of the sixth lens L6;

nd7: refractive index of the d line of the seventh lens L7;

ndg: refractive index of the d line of the optical filter GF;

vd: abbe number;

v1: abbe number of the first lens L1;

v2: abbe number of the second lens L2;

v3: abbe number of the third lens L3;

v4: abbe number of the fourth lens L4;

v5: abbe number of the fifth lens L5;

v6: abbe number of the sixth lens L6;

v7: abbe number of the seventh lens L7;

vg: abbe number of the optical filter GF.

Table 2 shows aspherical surface data of the camera optical lens 10 in Embodiment 1 of the present disclosure.

TABLE 2 Conic coefficient Aspheric surface coefficients k A4 A6 A8 A10 A12 A14 A16 A18 A20 R1 −7.2913E−01 −2.2884E−02  2.6694E−02 −8.0081E−02  1.0172E−01 −6.9408E−02  2.2144E−02  3.1340E−04 −1.0059E−03 −1.6805E−04 R2 −6.4716E+01 −2.4248E−02  1.3695E−03  1.6239E−02  3.9448E−03 −3.2556E−04 −5.1917E−04 −2.5830E−04 −5.7879E−05 −1.8654E−04 R3  5.4768E+01 −1.2239E−02  2.0427E−02  2.2675E−02 −2.7460E−02  2.3524E−02 −6.9357E−03 −6.1705E−03  3.3910E−03 −5.5470E−04 R4  1.2276E+02 −2.9944E−02  1.0595E−01 −1.7849E−01  1.2310E−01 −4.4820E−02  9.8413E−03 −2.0261E−03 −3.1138E−04  2.9352E−04 R5 −6.3652E+00 −1.9123E−01  2.1014E−01 −3.0303E−01  2.8511E−01 −1.4826E−01  2.2639E−02  2.0878E−02 −1.2571E−02  1.8344E−03 R6  1.5570E+00 −2.6394E−01  2.3577E−01 −3.8367E−01  4.5380E−01 −3.6676E−01  1.5221E−01 −1.8293E−02  5.6797E−03 −9.2982E−03 R7 −1.4765E+02 −3.1759E−02 −2.6821E−02  7.2839E−03  3.4437E−02 −2.7677E−02 −2.2088E−03  4.8661E−03  4.2597E−03 −2.2369E−03 R8 −5.7121E+01 −3.0951E−02  5.0059E−02 −9.2338E−02  2.9609E−02  2.3531E−02 −1.2448E−02 −5.6424E−05 −4.3853E−03  3.4712E−03 R9 −7.3818E+00  1.1190E−01 −1.2791E−03 −1.0348E−01  1.2535E−01 −6.7761E−02  9.6758E−03  5.7628E−04  7.9907E−04 −6.1809E−05 R10 −3.2877E+00  1.2427E−01 −9.0109E−02  7.6709E−02 −3.8260E−02  1.0419E−02 −2.1390E−03  1.0299E−04  4.0116E−05  1.8647E−05 R11 −1.4876E+01 −9.9022E−04 −8.3396E−02  6.3112E−02 −2.8741E−02  6.7709E−03 −5.0284E−04 −1.0669E−04 −3.4942E−05  1.9618E−05 R12 −2.1018E+01 −1.8349E−02 −2.8139E−02  9.9696E−03 −9.7517E−04 −1.2115E−04 −1.9238E−05  1.0200E−06  8.9039E−07  1.9670E−07 R13 −5.1503E+00 −1.8177E−01  8.2246E−02 −1.5065E−02  1.3463E−03 −4.8113E−05 −5.7150E−06  1.2416E−07  1.5727E−08  1.4219E−08 R14 −1.0565E+01 −1.4874E−01  8.2972E−02 −2.7406E−02  6.0534E−03 −8.3622E−04  6.5151E−05 −2.7697E−06  8.1822E−08 −2.6781E−09

Here, K is a conic coefficient, and A4, A6, A8, A10, A12, A14, A16, A18, and A20 are aspheric surface coefficients.

IH: Image height

y=(x ² /R)/[1+{1−(k+1)(x ² /R ²)}^(1/2)]+A4x ⁴ +A6x ⁶ +A8x ⁸ +A10x ¹⁰ +A12x ¹² +A14x ¹⁴ +A16x16+A18x ¹⁸ +A20x ²⁰  (1)

For convenience, an aspheric surface of each lens surface uses the aspheric surfaces shown in the above formula (1). However, the present disclosure is not limited to the aspherical polynomials form shown in the formula (1).

Table 3 and Table 4 show design data of inflexion points and arrest points of the camera optical lens 10 according to Embodiment 1 of the present disclosure. P1R1 and P1R2 represent the object-side surface and the image-side surface of the first lens L1, P2R1 and P2R2 represent the object-side surface and the image-side surface of the second lens L2, P3R1 and P3R2 represent the object-side surface and the image-side surface of the third lens L3, P4R1 and P4R2 represent the object-side surface and the image-side surface of the fourth lens L4, P5R1 and P5R2 represent the object-side surface and the image-side surface of the fifth lens L5, P6R1 and P6R2 represent the object-side surface and the image-side surface of the sixth lens L6, P7R1 and P7R2 represent the object-side surface and the image-side surface of the seventh lens L7. The data in the column named “inflexion point position” refer to vertical distances from inflexion points arranged on each lens surface to the optic axis of the camera optical lens 10. The data in the column named “arrest point position” refer to vertical distances from arrest points arranged on each lens surface to the optical axis of the camera optical lens 10.

TABLE 3 Number(s) of Inflexion point Inflexion point Inflexion point inflexion points position 1 position 2 position 3 P1R1 1 1.255 P1R2 1 1.195 P2R1 1 1.125 P2R2 0 P3R1 1 0.445 P3R2 1 0.655 P4R1 2 0.405 1.025 P4R2 1 1.085 P5R1 2 0.505 0.985 P5R2 3 0.665 1.245 1.395 P6R1 2 0.555 1.585 P6R2 2 0.545 1.915 P7R1 2 1.265 1.885 P7R2 2 1.465 1.985

TABLE 4 Number(s) of arrest points Arrest point position 1 P1R1 0 P1R2 0 P2R1 0 P2R2 0 P3R1 1 0.815 P3R2 0 P4R1 1 0.715 P4R2 0 P5R1 0 P5R2 0 P6R1 1 1.035 P6R2 1 1.055 P7R1 0 P7R2 0

FIG. 2 and FIG. 3 illustrate a longitudinal aberration and a lateral color with wavelengths of 656 nm, 588 nm, 546 nm, 486 nm and 436 nm after passing the camera optical lens 10 according to Embodiment 1, respectively. FIG. 4 illustrates a field curvature and a distortion with a wavelength of 546 nm after passing the camera optical lens 10 according to Embodiment 1. A field curvature S in FIG. 4 is a field curvature in a sagittal direction, and T is a field curvature in a tangential direction.

Table 13 in the following shows various values of Embodiments 1, 2, 3 and values corresponding to parameters which are specified in the above conditions.

As shown in Table 13, Embodiment 1 satisfies the above conditions.

In this Embodiment, an entrance pupil diameter of the camera optical lens is 2.554 mm, an image height of 1.0H is 3.40 mm, an FOV (field of view) in a diagonal direction is 78.81°. Thus, the camera optical lens has a wide-angle and is ultra-thin. Its on-axis and off-axis aberrations are fully corrected, thereby achieving excellent optical characteristics.

Embodiment 2

Embodiment 2 is basically the same as Embodiment 1 and involves symbols having the same meanings as Embodiment 1, and only differences therebetween will be described in the following.

Table 5 and Table 6 show design data of a camera optical lens 20 in Embodiment 2 of the present disclosure.

TABLE 5 R d nd νd S1 ∞ d0= −0.300 R1 2.038 d1= 0.481 nd1 1.5473 ν1 55.81 R2 4.076 d2= 0.107 R3 5.951 d3= 0.496 nd2 1.5473 ν2 55.81 R4 −8.372 d4= 0.072 R5 5.886 d5= 0.225 nd3 1.6464 ν3 23.54 R6 2.207 d6= 0.303 R7 5.822 d7= 0.448 nd4 1.5473 ν4 55.81 R8 −13.802 d8= 0.277 R9 −1.553 d9= 0.380 nd5 1.6464 ν5 23.54 R10 −1.707 d10= 0.070 R11 2.021 d11= 0.505 nd6 1.5473 ν6 55.81 R12 2.821 d12= 0.618 R13 12.562 d13= 0.367 nd7 1.8099 ν7 40.89 R14 2.732 d14= 0.559 R15 ∞ d15= 0.210 ndg 1.5168 νg 64.17 R16 ∞ d16= 0.143

Table 6 shows aspherical surface data of each lens of the camera optical lens 20 in Embodiment 2 of the present disclosure.

TABLE 6 Conic coefficient Aspheric surface coefficients k A4 A6 A8 A10 A12 A14 A16 A18 A20 R1 −1.2909E−01 −1.8474E−02  2.1591E−02 −7.7325E−02  9.7219E−02 −7.1543E−02  2.1770E−02  5.3088E−04 −8.4231E−04 −8.9410E−05 R2  6.8737E+00 −7.0714E−02 −2.1248E−02 −3.6470E−05  5.7032E−03  1.5956E−03  1.3171E−05 −1.3806E−04 −5.0167E−05 −8.0407E−05 R3  9.5419E+00 −5.1763E−02 −1.8834E−02  2.8341E−02 −2.3242E−02  2.6177E−02 −5.4996E−03 −5.8717E−03  3.2783E−03 −6.1607E−04 R4 −4.1646E+02 −5.8278E−02  9.9310E−02 −1.5885E−01  1.2165E−01 −4.9025E−02  9.2176E−03 −8.2086E−04  4.2277E−04 −1.8178E−04 R5  1.9621E+01 −1.1617E−01  1.6010E−01 −3.0969E−01  2.9040E−01 −1.4417E−01  2.3251E−02  1.9703E−02 −1.3637E−02  2.4453E−03 R6  1.6962E+00 −1.6702E−01  2.3871E−01 −4.2153E−01  4.7933E−01 −3.4765E−01  1.4942E−01 −2.9109E−02  2.4119E−04 −5.6306E−05 R7  5.5320E+00 −5.4171E−02  2.0999E−02 −1.5626E−02  1.5611E−02 −2.0075E−02  5.7128E−03  3.1433E−03  1.0616E−03 −1.1247E−03 R8 −5.6575E+02 −8.7547E−02  6.1184E−02 −6.9692E−02  3.1107E−02  1.5676E−02 −1.5302E−02  3.7438E−03 −6.5842E−04  1.9221E−04 R9 −1.5781E+00  8.3841E−02 −3.0983E−02 −8.0974E−02  1.3670E−01 −6.5257E−02  9.6324E−03 −1.9025E−04  2.6142E−04 −5.7895E−05 R10 −2.3177E−01  7.9510E−02 −7.3764E−02  7.4116E−02 −3.5961E−02  1.2581E−02 −1.7613E−03 −1.4473E−04 −1.4102E−04  5.5936E−05 R11 −5.1181E+00  1.3824E−02 −7.9927E−02  6.0635E−02 −3.1502E−02  6.9874E−03 −1.9489E−04 −1.5431E−05 −3.7215E−05  5.8381E−06 R12 −9.3172E+00  3.9852E−02 −3.8255E−02  9.1054E−03 −6.7228E−04 −1.3059E−05 −6.0852E−06  3.4198E−07  1.4158E−07 −1.6115E−08 R13  2.4745E+01 −1.7059E−01  7.5414E−02 −1.5055E−02  1.4003E−03 −3.9216E−05 −4.3072E−06  2.5872E−07 −4.5192E−09 −3.2948E−09 R14 −3.1814E−01 −1.8490E−01  8.3267E−02 −2.7519E−02  6.0739E−03 −8.3224E−04  6.5342E−05 −2.7876E−06  7.9004E−08 −2.4956E−09

Table 7 and table 8 show design data of inflexion points and arrest points of each lens of the camera optical lens 20 lens according to Embodiment 2 of the present disclosure.

TABLE 7 Number(s) of Inflexion point Inflexion point Inflexion point inflexion points position 1 position 2 position 3 P1R1 1 0.975 P1R2 2 0.555 1.065 P2R1 3 0.535 0.865 1.255 P2R2 0 P3R1 1 0.475 P3R2 0 P4R1 2 0.625 1.075 P4R2 1 1.105 P5R1 2 0.875 1.325 P5R2 1 1.005 P6R1 2 0.725 1.735 P6R2 1 0.925 P7R1 3 0.205 1.305 1.805 P7R2 1 0.465

TABLE 8 Number of Arrest point Arrest point arrest points position 1 position 2 P1R1 0 P1R2 2 0.995 1.115 P2R1 0 P2R2 0 P3R1 1 0.785 P3R2 0 P4R1 0 P4R2 0 P5R1 0 P5R2 0 P6R1 1 1.185 P6R2 1 1.575 P7R1 1 0.355 P7R2 1 0.935

FIG. 6 and FIG. 7 illustrate a longitudinal aberration and a lateral color of light with wavelengths of 656 nm, 588 nm, 546 nm, 486 nm and 436 nm after passing the camera optical lens 20 according to Embodiment 2. FIG. 8 illustrates a field curvature and a distortion of light with a wavelength of 546 nm after passing the camera optical lens 20 according to Embodiment 2.

As shown in Table 13, Embodiment 2 satisfies the above conditions.

In an embodiment, an entrance pupil diameter of the camera optical lens is 2.563 mm, an image height of 1.0H is 3.4 mm, an FOV (field of view) in the diagonal direction is 78.54°. Thus, the camera optical lens has a wide-angle and is ultra-thin. Its on-axis and off-axis aberrations are fully corrected, thereby achieving excellent optical characteristics.

Embodiment 3

Embodiment 3 is basically the same as Embodiment 1 and involves symbols having the same meanings as Embodiment 1, and only differences therebetween will be described in the following.

Table 9 and Table 10 show design data of a camera optical lens 30 in Embodiment 3 of the present disclosure.

TABLE 9 R d nd νd S1 ∞ d0= −0.188 R1 3.157 d1= 0.472 nd1 1.5473 ν1 55.81 R2 7.790 d2= 0.251 R3 8.360 d3= 0.701 nd2 1.5473 ν2 55.81 R4 −7.904 d4= 0.122 R5 2.750 d5= 0.213 nd3 1.6464 ν3 23.54 R6 2.329 d6= 0.260 R7 −58.268 d7= 0.330 nd4 1.5473 ν4 55.81 R8 9.365 d8= 0.265 R9 −1.858 d9= 0.328 nd5 1.6464 ν5 23.54 R10 −3.403 d10= 0.064 R11 1.067 d11= 0.707 nd6 1.5473 ν6 55.81 R12 2.773 d12= 0.929 R13 10.194 d13= 0.160 nd7 2.1171 ν7 18.05 R14 3.391 d14= 0.295 R15 ∞ d15= 0.210 ndg 1.5168 νg 64.17 R16 ∞ d16= 0.143

Table 10 shows aspherical surface data of each lens of the camera optical lens 30 in Embodiment 3 of the present disclosure.

TABLE 10 Conic coefficient Aspheric surface coefficients k A4 A6 A8 A10 A12 A14 A16 A18 A20 R1  1.2360E+00 −2.2368E−02  4.5820E−02 −7.9656E−02  1.0456E−01 −6.9809E−02  1.9488E−02 −1.7941E−03 −1.5203E−03  8.2946E−04 R2  2.9017E+01  2.0288E−02  1.9205E−02  3.0400E−02 −9.6014E−03 −1.0525E−02 −3.1418E−03  1.1933E−03  1.0261E−03 −4.3639E−04 R3  3.2738E+01 −7.9082E−03  2.9819E−02  2.7590E−02 −4.1034E−02  1.7245E−02 −4.7421E−03 −2.3995E−03  4.9474E−03 −2.1009E−03 R4  1.9312E+01 −2.0128E−01  2.0914E−01 −1.5441E−01  1.0865E−01 −5.5018E−02  8.7779E−03  2.0557E−04  1.3934E−03  2.3723E−04 R5 −9.4502E+00 −2.4533E−01  2.3344E−01 −3.0551E−01  2.8222E−01 −1.4753E−01  2.4605E−02  2.1806E−02 −1.2626E−02  1.9406E−03 R6  1.4241E+00 −1.2183E−01  1.3904E−01 −3.5706E−01  4.7903E−01 −3.6204E−01  1.4510E−01 −2.7047E−02  2.6992E−03 −5.8911E−04 R7 −2.6694E+01 −3.6674E−02  1.0229E−02  2.9322E−03  2.3132E−02 −2.6337E−02  1.8252E−03  4.6610E−03  3.0030E−03 −2.1197E−03 R8 −7.2604E+01 −1.1317E−01  6.4456E−02 −8.9057E−02  3.1697E−02  2.0616E−02 −1.2057E−02  3.1383E−03 −1.8031E−03  4.9000E−04 R9 −4.1361E+01  7.1618E−02 −3.1156E−02 −9.7772E−02  1.3430E−01 −6.3795E−02  1.0515E−02 −3.0207E−05  2.3807E−04 −1.6362E−04 R10  1.4480E+00  6.5832E−02 −8.5730E−02  8.1111E−02 −3.6914E−02  1.1011E−02 −2.0789E−03  7.7502E−06 −4.7921E−05  2.9707E−05 R11 −8.1794E+00  1.0162E−01 −1.1221E−01  6.6214E−02 −2.8155E−02  6.5728E−03 −4.4853E−04 −4.1504E−05 −1.8948E−05  4.7136E−06 R12 −2.8629E+01  7.4498E−02 −4.1565E−02  7.8011E−03 −6.1149E−04  1.6611E−05 −4.6528E−06 −3.3755E−07 −4.4425E−08  2.3806E−08 R13  9.9628E+00 −2.0880E−01  7.9005E−02 −1.4939E−02  1.4045E−03 −3.7697E−05 −4.0129E−06  3.1631E−07  5.8783E−09 −1.2498E−09 R14 −1.3741E−01 −1.9252E−01  8.3866E−02 −2.7378E−02  6.0758E−03 −8.3272E−04  6.5300E−05 −2.7854E−06  8.0170E−08 −2.3552E−09

Table 11 and Table 12 show design data inflexion points and arrest points of the respective lenses in the camera optical lens 30 according to Embodiment 3 of the present disclosure.

TABLE 11 Number(s) of Inflexion point Inflexion point Inflexion point inflexion points position 1 position 2 position 3 P1R1 1 1.065 P1R2 1 1.055 P2R1 1 1.105 P2R2 1 1.075 P3R1 2 0.365 1.055 P3R2 1 0.715 P4R1 2 0.905 1.235 P4R2 2 0.285 1.105 P5R1 3 0.425 0.725 1.105 P5R2 2 0.945 1.285 P6R1 2 0.905 1.945 P6R2 1 1.065 P7R1 2 0.205 1.635 P7R2 2 0.395 2.545

TABLE 12 Number of Arrest point Arrest point arrest points position 1 position 2 P1R1 0 P1R2 0 P2R1 0 P2R2 0 P3R1 2 0.675 1.205 P3R2 0 P4R1 1 1.115 P4R2 1 0.495 P5R1 0 P5R2 0 P6R1 1 1.515 P6R2 1 1.645 P7R1 1 0.355 P7R2 1 0.735

FIG. 10 and FIG. 11 illustrate a longitudinal aberration and a lateral color of light with wavelengths of 656 nm, 588 nm, 546 nm, 486 nm and 436 nm after passing the camera optical lens 30 according to Embodiment 3. FIG. 12 illustrates a field curvature and a distortion of light with a wavelength of 546 nm after passing the camera optical lens 30 according to Embodiment 3.

Table 13 in the following lists values corresponding to the respective conditions in an embodiment according to the above conditions. Obviously, the embodiment satisfies the above conditions.

In an embodiment, an entrance pupil diameter of the camera optical lens is 2.342 mm, an image height of 1.0H is 3.40 mm, an FOV (field of view) in the diagonal direction is 83.72°. Thus, the camera optical lens has a wide-angle and is ultra-thin. Its on-axis and off-axis aberrations are fully corrected, thereby achieving excellent optical characteristics.

TABLE 13 Parameters and conditions Embodiment 1 Embodiment 2 Embodiment 3 f 4.085 4.100 3.747 f1 6.177 6.875 9.360 f2 13.808 6.435 7.538 f3 −10.855 −5.599 −29.389 f4 5.430 7.543 −14.716 f5 −11.505 −875.615 −6.905 f6 11.349 10.638 2.764 f7 −24.946 −4.384 −4.606 f12 4.402 3.541 4.433 FNO 1.60 1.60 1.60 f1/f 1.51 1.68 2.50 n7 1.71 1.81 2.12 f3/f4 −2.00 −0.74 2.00 (R13 + R14)/ −9.96 1.56 2.00 (R13 − R14) d13/TTL 0.08 0.07 0.03

It can be appreciated by one having ordinary skill in the art that the description above is only embodiments of the present disclosure. In practice, one having ordinary skill in the art can make various modifications to these embodiments in forms and details without departing from the scope of the present disclosure. 

What is claimed is:
 1. A camera optical lens comprising, from an object side to an image side: a first lens; a second lens; a third lens; a fourth lens; a fifth lens; a sixth lens; and a seventh lens; wherein the camera optical lens satisfies following conditions: 1.51≤f1/f≤2.50; 1.70≤n7≤2.20; −2.00≤f3/f4≤2.00; −10.00≤(R13+R14)/(R13−R14)≤2.00; and 0.01≤d13/TTL≤0.08; where f denotes a focal length of the camera optical lens; f1 denotes a focal length of the first lens; f3 denotes a focal length of the third lens; f4 denotes a focal length of the fourth lens; n7 denotes a refractive index of the seventh lens; d13 denotes an on-axis thickness of the seventh lens; TTL donates a total optical length from an object-side surface of the first lens to an image surface of the camera optical lens along an optical axis; R13 denotes a curvature radius of an object-side surface of the seventh lens; and R14 denotes a curvature radius of an image-side surface of the seventh lens.
 2. The camera optical lens according to claim 1 further satisfying following conditions: 1.71≤n7≤2.16; −9.98≤(R13+R14)/(R13−R14)≤2.00; and 0.02≤d13/TTL≤0.08.
 3. The camera optical lens according to claim 1, wherein the first lens has a positive refractive power, and comprises an object-side surface being convex in a paraxial region and an image-side surface being concave in the paraxial region; and the camera optical lens further satisfies following conditions: −6.00≤(R1+R2)/(R1−R2)≤−1.52; and 0.04≤d1/TTL≤0.14; where R1 denotes a curvature radius of the object-side surface of the first lens; R2 denotes a curvature radius of the image-side surface of the first lens; and d1 denotes an on-axis thickness of the first lens.
 4. The camera optical lens according to claim 3 further satisfying following conditions: −3.75≤(R1+R2)/(R1−R2)≤−1.90; and 0.06≤d1/TTL≤0.11.
 5. The camera optical lens according to claim 1, wherein the second lens has a positive refractive power, and comprises an object-side surface being convex in a paraxial region and an image-side surface being convex in a paraxial region; the camera optical lens further satisfies following conditions: 0.78≤f2/f≤5.07; −1.00≤(R3+R4)/(R3−R4)≤0.04; and 0.04≤d3/TTL≤0.19; where f2 denotes a focal length of the second lens; R3 denotes a curvature radius of the object-side surface of the second lens; R4 denotes a curvature radius of the image-side surface of the second lens; and d3 denotes an on-axis thickness of the second lens.
 6. The camera optical lens according to claim 5 further satisfying following conditions: 1.26≤f2/f≤4.06; −0.62≤(R3+R4)/(R3−R4)≤0.03; and 0.07≤d3/TTL≤0.15.
 7. The camera optical lens according to claim 1, wherein the third lens has a negative refractive power, and comprises an object-side surface being convex in a paraxial region and an image-side surface being concave in a paraxial region; the camera optical lens further satisfies following conditions: −15.69≤f3/f≤−0.91; 1.10≤(R5+R6)/(R5−R6)≤18.10; and 0.02≤d5/TTL≤0.06; where R5 denotes a curvature radius of the object-side surface of the third lens; R6 denotes a curvature radius of the image-side surface of the third lens; d5 denotes an on-axis thickness of the third lens.
 8. The camera optical lens according to claim 7 further satisfying following conditions: −9.80≤f3/f≤−1.14; 1.76≤(R5+R6)/(R5−R6)≤14.48; and 0.03≤d5/TTL≤0.05.
 9. The camera optical lens according to claim 1, wherein the fourth lens has a refractive power; and the camera optical lens further satisfies following conditions: −7.85≤f4/f≤2.76; −0.81≤(R7+R8)/(R7−R8)≤1.08; 0.03≤d7/TTL≤0.13; where R7 denotes a curvature radius of an object-side surface of the fourth lens; R8 denotes a curvature radius of an image-side surface of the fourth lens; d7 denotes an on-axis thickness of the fourth lens.
 10. The camera optical lens according to claim 9 further satisfying following conditions: −4.91≤f4/f≤2.21; −0.51≤(R7+R8)/(R7−R8)≤0.87; and 0.05≤d7/TTL≤0.10.
 11. The camera optical lens according to claim 1, wherein the fifth lens has a negative refractive power, and comprises an object-side surface being concave in a paraxial region and an image-side surface being convex in the paraxial region; and the camera optical lens further satisfies following conditions: −427.13≤f5/f≤−1.23; −42.34≤(R9+R10)/(R9−R10)≤−2.27; and 0.03≤d9/TTL≤0.11; where f5 denotes a focal length of the fifth lens; R9 denotes a curvature radius of the object-side surface of the fifth lens; R10 denotes a curvature radius of the image-side surface of the fifth lens; d9 denotes an on-axis thickness of the fifth lens.
 12. The camera optical lens according to claim 11 further satisfying following conditions: −266.96≤f5/f≤−1.54; −26.46≤(R9+R10)/(R9−R10)≤−2.84; and 0.05≤d9/TTL≤0.09.
 13. The camera optical lens according to claim 1, wherein the sixth lens has a positive refractive power, and comprises an object-side surface being convex in a paraxial region and an image-side surface being concave in the paraxial region, and the camera optical lens further satisfies following conditions: 0.37≤f6/f≤4.17; −23.83≤(R11+R12)/(R11−R12)≤−1.50; and 0.05≤d11/TTL≤0.19; where f6 denotes a focal length of the sixth lens; R11 denotes a curvature radius of the object-side surface of the sixth lens; R12 denotes a curvature radius of the image-side surface of the sixth lens; d11 denotes an on-axis thickness of the sixth lens.
 14. The camera optical lens according to claim 13 further satisfying following conditions: 0.59≤f6/f≤3.3; −14.89≤(R11+R12)/(R11−R12)≤−1.88; and 0.08≤d11/TTL≤0.16.
 15. The camera optical lens according to claim 1, wherein the seventh lens has a negative refractive power; and the camera optical lens further satisfies following condition: −12.21≤f7/f≤−0.71; where f7 denotes a focal length of the seventh lens.
 16. The camera optical lens according to claim 15 further satisfying following condition: −7.63≤f7/f≤−0.89.
 17. The camera optical lens according to claim 1, where the total optical length TTL of the camera optical lens is less than or equal to 6.00 mm.
 18. The camera optical lens according to claim 17, wherein the total optical length TTL of the camera optical lens is less than or equal to 5.72 mm.
 19. The camera optical lens according to claim 1, wherein an F number of the camera optical lens is less than or equal to 1.65.
 20. The camera optical lens according to claim 19, wherein the F number of the camera optical lens is less than or equal to 1.62. 